While Battleborn got off to to a rather disastrous start, I have commend Gearbox for how much effort they've put in to fixing the situation. Not only did they continue releasing heroes and balance updates despite a dwindling playerbase, but they've also recently patched in a whole bunch of changes to help new players get acclimated.
Continuing on with this trend they have just released the fourth DLC Story Operation "Montana and the Demon Bear", as well as a brand new hero called Beatrix. Then again, calling her a hero might be a bit of a stretch given that her entire shtick is spreading debilitating poisons and diseases among her enemies. If you're wondering what all of this madness might look like in action, here's the skill overview video for Beatrix: